a=21+-2(3)

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Solution for a=21+-2(3) equation: 


Simplifying
a = 21 + -2(3)

Multiply -2 * 3
a = 21 + -6

Combine like terms: 21 + -6 = 15
a = 15

Solving
a = 15

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Simplifying
a = 15

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